vault

拱顶, 窖, 地下室, 撑竿跳, 穹窿

a burial chamber (usually underground); a strongroom or compartment (often made of steel) for safekeeping of valuables; an arched brick or stone ceiling or roof; the act of jumping over an obstacle

做成圆拱形, 撑竿跳过

成穹状弯曲, 跳跃